Portable bluetooth speaker



FIG. 1 is a perspective view of the portable bluetooth speaker;

FIG. 2 is a front view of the portable bluetooth speaker;

FIG. 3 is a back view of the portable bluetooth speaker;

FIG. 4 is a right side view of the portable bluetooth speaker;

FIG. 5 is a left side view of the portable bluetooth speaker;

FIG. 6 is a top view of the portable bluetooth speaker; and,

FIG. 7 is a bottom view of the portable bluetooth speaker.

The broken line showing of features seen in FIGS. 5 and 7 are included for the purpose of illustrating and forms no part of the claimed design. 

CLAIM What is claimed is the ornamental design for a portable bluetooth speaker, as shown and described. 